Adobe Captivate 8 has three default breakpoints / layouts based on the most common
device viewport sizes.
Not exact matches
So if the
viewport size for the mobile
device is 360 x 576, set the course dimension as 360 x 522 after deducting 45 pixels from the height.
Viewport size is the visible area, excluding the area covered by the address bar and other menu options, in the
device browser.
Since each of the 7 ″ color pads (Kindle Fire, KOBO VOX, Nook) has its own specs, could I use
viewport size to create separate ePUB editions to match each of the
devices?
Since our smartphones and tablets have become widely used, readers might find it time - consuming to read the text in PDF clearly on these
devices with their smaller
viewports.
It was clarified that media queries have no effect on the
viewport dimensions, only on which style sheet is applied based on the
device screen.
Rendition selection should occur on initial rendering, and Reading Systems should re-evaluate the selection in response to changes in the User environment (e.g., change in
device orientation or
viewport size).
There is coding on the cover page that maximizes the cover image to the edge of the reading
device's
viewport no matter what its size.
The application, called «Detecting backside force in a touch - screen
device,» says the backside actions with 3D Touch includes «multi-tasking application switches or content or
viewport manipulation.»